Processes influencing the lifetime of electric contacts containing silver-cadmium were studied under simulated operating conditions. Between the contacts, pulsing arc discharge was used. For the continuous measurement of the weight loss due to discharge, a thermobalance was constructed. Spectrograms were recorded from the arc discharges and by measuring the intensity of spectral lines the cadmium/silver concentration ratio was determined in the arc discharge. The measurements yielded conclusions on the expected lifetime of the three types of contacts investigated. The composition of the surface layer formed during arc discharge was studied by derivatographic method. Optimum temperature and duration of the previous oxidation of the silver-cadmium alloy were determined. The depth of the previous oxidization and the structure of the oxidized layer were investigated by means of an electron microsonde.
|Number of pages||15|
|Journal||Periodica Polytechnica Chemical Engineering|
|Publication status||Published - Jan 1 1974|
ASJC Scopus subject areas
- Chemical Engineering(all)